JP2004146170A - Connection structure of flat circuit unit and cabling material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure of a flat circuit unit and a cabling material wherein the cost is reduced and connections are reduced in size by reducing the number of connections and working man-hour. <P>SOLUTION: An exposed conductor 1a of a flat circuit unit 1 and an exposed conductor 3a of the cabling material 2 are piled up, and fastening parts 4 composed of conductive metal is made to straddle on the conductor 1a, and a pair of the tip parts 4a are stuck into a flexible insulating substrate 1c and made to be penetrated and bent in the mutually approaching direction so that the conductor 1a and the conductor 3a are fastened to be crimped, and the conductor 1a and the conductor 3a are electrically connected. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection structure between a flat circuit body and a wiring member.
[0002]
[Prior art]
Conventionally, electrical connections between flat circuit bodies such as flexible flat cables and flexible printed circuits and wiring materials such as wire harnesses have been made by connecting terminals of conductors on the flat circuit bodies and terminals of wiring materials, connecting terminals and connectors, etc. Are performed by attaching these connection parts and electrically connecting these connection parts.
In some cases, the connection terminal attached to the terminal of the wiring member is crimped to the conductor of the flat circuit member to electrically connect the wiring member to the flat circuit member (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2001-210411 (paragraphs (0013) to (0021), FIGS. 1 to 5)
[0004]
[Problems to be solved by the invention]
The above-described electrical connection between the flat circuit body and the wiring member has the following problems. That is,
1) In the case where connection is performed by attaching a connection component to each of the flat circuit body and the wiring member, two types of connection components are required, and the number of connection component attachment processes is two, which causes an increase in cost. .
Further, when a relatively large connector provided with a housing for accommodating the terminal is used as the connection component, the electrical connection between the flat circuit body and the wiring member requires at least the volume of the connector and becomes large.
2) Even when the connection terminal attached to the terminal of the wiring material is directly crimped to the conductor of the flat circuit body, a step of attaching the connection terminal to one type of connection component and the wiring material is required, and there is a limit in cost reduction.
[0005]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is that the conductor of the flat circuit body and the conductor of the wiring material are crimped by crimping parts and press-contact to electrically connect. And a connection structure between the flat circuit body and the wiring member.
According to a second aspect of the present invention, in the first aspect of the present invention, the caulked component is made of a conductive metal.
Further, the invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, a conductive adhesive is attached to a press-contact portion between the conductor of the flat circuit body and the conductor of the wiring member. .
[0006]
According to the first aspect of the present invention, the conductor of the flat circuit body and the conductor of the wiring member can be electrically connected to each other by press-contacting the conductor of the flat circuit body by using one kind of crimping component. It is not necessary to attach to the conductor of the circuit body or the conductor of the wiring material in advance. Therefore, only one kind of connecting parts is required at the minimum, and an attaching step of attaching the connecting parts to the conductor in advance is unnecessary, so that the cost is reduced as compared with the conventional case.
In addition, since the caulking component can be made smaller than a connection component such as a connector, the electrical connection between the flat circuit body and the wiring member can be made smaller than before.
[0007]
Further, when the caulking component is made of a conductive metal as in claim 2, it is preferable in terms of electrical conduction between the conductor of the flat circuit body and the conductor of the wiring member. It is more preferable from the viewpoint of electrical continuity that a conductive adhesive is adhered to the press-contact portion between the conductor of FIG.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIGS. 1A to 1D are explanatory views of a process for manufacturing a connection structure between a flat circuit body and a wiring member according to the present invention.
[0009]
As shown in FIG. 1A, this embodiment includes a flexible printed circuit (FPC) 1 that is a flat circuit body, a wire harness 2 that is a wiring member, and a caulking component 4, and a conductor 1a of the FPC 1. And a conductor 3 a of an electric wire 3 constituting the wire harness 2 is electrically connected by a caulking part 4.
The caulking component 4 is made of a conductive metal plate, is bent in a U-shape, and a pair of opposed end portions 4a are narrow and sharply pointed.
[0010]
The manufacturing process of the connection structure between the FPC 1 and the wire harness 2 is as follows. That is,
1) First, as shown in FIG. 1A, the insulating coating 1b of the FPC 1 is partially peeled off to expose required portions (ends in this case) of the five conductors 1a. In addition, the conductors 3a at the ends of the five electric wires 3 constituting the wire harness 2 are exposed.
2) Next, as shown in FIG. 1B, the exposed conductors 3a of the five electric wires 3 are respectively superimposed on the five exposed conductors 1a of the FPC 1. Then, the crimped part 4 is straddled over the stacked conductors 1a, 3a, and the pair of tip portions 4a are pierced into the flexible insulating substrate 1c of the FPC 1 as shown in FIG. Then, the conductors 1a and 3a are bent in directions approaching each other and caulked. In this state, the conductors 1a and 3a are pressed and electrically connected.
3) Next, as shown in FIG. 1 (d), an insulating sheet 5 is adhered or welded to both surfaces of the electrical connection portions of the conductors 1a and 3a to secure electrical insulation.
[0011]
The present embodiment is different from the conventional example in that the conductor 3a of the electric wire 3 and the conductor 1a of the FPC 1 are crimped by one crimping part 4 to be pressed and electrically connected.
[0012]
As described above, in the present embodiment, the conductor 1a and the conductor 3a can be electrically connected by one caulking part 4, and the caulking part 4 is connected to the conductor 1a and the conductor 3a in advance. No need. Therefore, the conductor 1a and the conductor 3a can be electrically connected with a minimum number of one component and a minimum number of one process, so that the cost is reduced.
Further, since the conductor 1a and the conductor 3a are connected by the caulking part 4 which is smaller than the connector, the space occupied by the electrical connection part is smaller than that of the conventional case.
[0013]
In the above-described embodiment, the metal plate forming the caulked component 4 is preferably as conductive as possible.
As shown in FIG. 2, holes 1d are previously formed on both sides of the exposed portion of the FPC 1 to which the conductor 1a is to be connected. The fastening parts 4 can be easily attached to the FPC 1.
Further, when a conductive adhesive is applied to the press-contact portion between the conductor 1a and the conductor 3a by applying or the like, the conductivity between the conductor 1a and the conductor 3a is improved.
[0014]
【The invention's effect】
As described above, according to the present invention, when electrically connecting a flat circuit body and a wiring member, the number of connecting parts and the number of working steps are reduced, so that the cost is reduced and the connecting portion is downsized. There is an excellent effect.
[Brief description of the drawings]
FIGS. 1 (a) to 1 (d) are explanatory views of manufacturing steps of an embodiment of a connection structure between a flat circuit body and a wiring member according to the present invention.
FIG. 2 is a perspective view of an electrical connection portion of an FPC according to another embodiment of the present invention.
[Explanation of symbols]
1 FPC
1a, 3a conductor 1b insulating coating 1c flexible insulating substrate 1d hole 2 wire harness 3 electric wire 4 crimping part 4a tip 5 insulating sheet

Claims (3)

A connection structure between a flat circuit body and a wiring member, wherein the conductor of the flat circuit body and the conductor of the wiring member are crimped by a caulking component to be in pressure contact with and electrically connected. 2. The connection structure between a flat circuit body and a wiring member according to claim 1, wherein the caulked component is made of a conductive metal. 3. A connection structure between a flat circuit body and a wiring material according to claim 1, wherein a conductive adhesive is attached to a press-contact portion between the conductor of the flat circuit body and the conductor of the wiring material.

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